double2_add double2_eq double2_make double2_out double2_set double3_add double3_eq double3_make double3_out double3_set double4_add double4_eq double4_make double4_out double4_set

double3_make() double3 * double3_make ( double  a, double  b, double  c  ) Create a double3 value from the double values.